Removal of the catalyst from polyphenylene ethers

Details Removal of the catalyst from polyphenylene ethers Removal of the catalyst from polyphenylene ethers

1984-07-18

1985-08-20

Lee, Lester L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

528212, 528214, 528215, 528487, 528492, C08G 6544

Patent

active

045365679

ABSTRACT:
High molecular weight polyphenylene ethers are prepared from a monohydric phenol by an oxidative coupling reaction with oxygen in the presence of a catalyst complex obtained from a copper salt and an organic amine, and in the presence of a solvent, by a process in which the metal component of the catalyst is removed after the polymerization by adding one or more organic ammonium salts of the general formula ##STR1## where A.sup..crclbar. is an anion or polyanion of an organic carboxylic, sulfonic or phosphonic acid, R.sup.1 is hydrogen, R.sup.2 and R.sup.3 are each hydrogen, alkyl of 1 to 18 carbon atoms or aryl and R.sup.4 is alkyl of 1 to 18 carbon atoms or aryl.

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patent: 4460764 (1984-07-01), Reffert et al.
patent: 4463164 (1984-07-01), Dalton et al.

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